Bore Tech BTCC35016: Bore Tech\'s C4 Carbon Remover is a non-flammable, non-hazardous, biodegradable cleaner. It helps remove stubborn carbon deposits quickly and corrosive salts from surplus ammunition and black power shooting. This cleaner is ideal for rifle barrels, bolt faces, flash suppressors, compensators, silencers, chamber throats, revolver cylinders, gas pistons, and other places that have extreme carbon fouling.